Till recently, the nuclear reactor Russia's Zarechny, a town in the Ural mountains, was out of bounds - with a reason. It is the world's only commercially operating Fast Breeder Reactor. NDTV visited the facility for a glimpse of the reactor, which produces many times more energy from the same amount of fuel in comparison with conventional atomic reactors. The tech**logy is coveted and Russia is the global leader in it. India is a close second. China is at least 10 years behind.